IL43591A - Optical cavity structure for a laser - Google Patents

Optical cavity structure for a laser

Info

Publication number
IL43591A
IL43591A IL43591A IL4359173A IL43591A IL 43591 A IL43591 A IL 43591A IL 43591 A IL43591 A IL 43591A IL 4359173 A IL4359173 A IL 4359173A IL 43591 A IL43591 A IL 43591A
Authority
IL
Israel
Prior art keywords
optical cavity
cavity structure
laser
optical
respect
Prior art date
Application number
IL43591A
Other versions
IL43591A0 (en
Original Assignee
Avco Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Avco Corp filed Critical Avco Corp
Publication of IL43591A0 publication Critical patent/IL43591A0/en
Publication of IL43591A publication Critical patent/IL43591A/en

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
    • H01S3/08—Construction or shape of optical resonators or components thereof
    • H01S3/086—One or more reflectors having variable properties or positions for initial adjustment of the resonator
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/02—Constructional details
    • H01S3/04—Arrangements for thermal management
    • H01S3/041—Arrangements for thermal management for gas lasers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/09—Processes or apparatus for excitation, e.g. pumping
    • H01S3/097—Processes or apparatus for excitation, e.g. pumping by gas discharge of a gas laser
    • H01S3/0979—Gas dynamic lasers, i.e. with expansion of the laser gas medium to supersonic flow speeds

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Optics & Photonics (AREA)
  • Fluid Mechanics (AREA)
  • Lasers (AREA)

Claims (20)

1. Optical cavity structure for a laser comprising mirrors which are held in spatial relationship to provide the optical axis of the laser, wherein the means for holdin the mirrors includes a plurality of spacer bodies the dimen sions of which exclusively define the spatial relationship of the mirrors, shielding means enclosing the spacer bodies, and means in substantial thermal contact with the shielding means, the shielding means and the means in thermal contact therewith serving to maintain the temperature of the spacer bodies sufficiently uniform that the thermal expansions and contractions thereof do not cause an excessive deviatio in the spatial relationship of the mirrors.
2. Optical cavity' structure as in claim 1, wherein the mirrors are each attached to one of two end blocks and t spacer bodies" are each" attached to"the""6nd"blocks"so~as "to hold the end blocks in spatial relationship.
3. Optical cavity structure as in claim 2, wherein the end blocks are supported on a support structure with respect to a mechanical reference in such a manner that at least one end block is movable with respect to the mechanical reference in the direction of the laser optical axis.
4. Optical cavity structure as in claim 2 or 3» wherein the shielding means enclosing the spacer bodies is fixedly connected to only one of the end blocks.
5. · -Optical-cavity structure as in. any of ..claims 43591/2 bodies includes a separate shield enclosing each of the spacer bodies.
6. Optical cavity structure as in claim 3, wherein the shielding means is fixedly attached to the other end block.
7. · Optical cavity structure as in any of claims 1 to 6, wherein there are at least four spacer bodies.
8. Optical cavity structure as in claim 7, wherein the four spacer bodies are of substantially uniform dimensions each oriented with its longitudinal axis substantially parallel to the optical axis of the laser and spaced from each other to permit direct access to the optical cavity from at least two opposite sides thereof.
9. Optical cavity structure as in claim 8, wherein the four spacer bodies are spaced from each other at the corners of a regular parallelpiped.
10. Optical cavity structure as in claim 8 or 9, wherein, means are, provided for directing exciting energy to the optical cavity from "one side thereof between spacer bodies and means are provided for directing a laser gas medium through the optical cavity, said gas medium entering from one of two said opposite sides and leaving from the other—of -said -two-oppo-si-te- sides .
11. -Optical cavity structure as in any of claims 1 to 10, wherein the spacer bodies are composed of a material selected_for_.its..relatively low. thermal, expansion and the shielding means is composed of a material selected for its relatively high thermal conductivity.
12. » Optical cavity structure as in claim 11, wherein the material selected for its relatively low thermal expan-sion is. a- nickel ..steel .
13. · Optical cavity structure as in claim 11 or 12, wherein the material selected for its relatively high conductivity is copper.
14. Optical cavity structure as in any of claims 1 to 13» wherein the means in thermal contact with the shielding means includes a coolant fluid with means for conducting said fluid against the shielding means.
15. · Optical cavity structure as in claim 3 or 6, wherein the support structure for supporting the end blocks with respect to a mechanical reference comprises two tracks on the bottom of said other end block which are directed along lines that cross at a point lying in a vertical plane passing through the optical axis of the laser and which make equal angles with respect thereto, a third track being on the bottom of said one end block on a line which lies in said plane, and three supports each of which contacts a different one of said tracks and upon which the end blocks rest, the tracks and supports being such that longitudinal expansion and contractions of the supported parts in a direction parallel to the optical axis and lateral expansions and contractions of the supported parts in a direction transverse to the optical axis do not result in excessive shifting or changes in the direction of the optical axis with respect to the three supports.
16. Optical cavity structure as in claim 15, wherein the tracks are grooves opening at the bottoms of the end blocks, the supports being upstanding rounded pads which fit in the grooves.
17. Optical cavity structure as in claim 15 or l6, wherein the crossing point of the lines of said two tracks lies between the end blocks.
18. Optical cavity structure as In any of claims to 17» wherein the support structure itself is supported at three points on said mechanical reference, said support structure being fixed with respect to the mechanical reference at a first of said points, movable in one direction only with respect to the reference at the second of said points and movable only in a direction transverse to said one direction with respect to the reference at the third of said points, the one direction being parallel to the optical axis of the laser, the locations of said points being such that expansions and contractions of the support structure in the said two directions do not excessively shift the position or the direction of the optical axis of the laser with respect to the mechanical reference.
19. Optical cavity structure as in claim 18, wherein the support at each of the three reference points is by a ball, the ball at each of the second and third points being disposed between opposing grooves in the support structure and mechanical reference.
20. Optical cavity structure for a laser, constructed and arranged substantially as hereinbefore described with reference to and as illustrated in the accompanying drawings.
IL43591A 1972-11-21 1973-11-07 Optical cavity structure for a laser IL43591A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00308347A US3808553A (en) 1972-11-21 1972-11-21 Thermally stable laser resonator support assembly

Publications (2)

Publication Number Publication Date
IL43591A0 IL43591A0 (en) 1974-06-30
IL43591A true IL43591A (en) 1976-07-30

Family

ID=23193623

Family Applications (1)

Application Number Title Priority Date Filing Date
IL43591A IL43591A (en) 1972-11-21 1973-11-07 Optical cavity structure for a laser

Country Status (10)

Country Link
US (1) US3808553A (en)
JP (1) JPS5922384B2 (en)
CA (1) CA993698A (en)
CH (1) CH580343A5 (en)
DE (1) DE2357927C2 (en)
FR (1) FR2207371B1 (en)
GB (1) GB1444404A (en)
IL (1) IL43591A (en)
IT (1) IT997600B (en)
SE (1) SE395796B (en)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1426161A (en) * 1973-03-09 1976-02-25 Avco Everett Res Lab Inc Flowing-gas laser apparatus
US3858122A (en) * 1973-12-26 1974-12-31 United Aircraft Corp Vibration isolation in a gas laser
US3860889A (en) * 1973-12-26 1975-01-14 United Aircraft Corp Stable platform structure for laser optics
US4030047A (en) * 1976-04-28 1977-06-14 Nasa Opto-mechanical subsystem with temperature compensation through isothermal design
EP0001032B1 (en) * 1977-08-18 1981-02-25 ELTRO GmbH Gesellschaft für Strahlungstechnik Gas laser with transversal excitation
US4456811A (en) * 1982-06-21 1984-06-26 Avco Everett Research Laboratory, Inc. Method of and apparatus for heat treating axisymmetric surfaces with an annular laser beam
JPS6024082A (en) * 1983-07-19 1985-02-06 Matsushita Electric Ind Co Ltd laser oscillator
US4618223A (en) * 1983-09-29 1986-10-21 The United States Of America As Represented By The Secretary Of The Navy Thermoelectric actuator for mirror adjustment
GB2194671B (en) * 1983-12-29 1988-09-21 Amada Eng & Service High-speed axial flow type gas laser oscillator
JPS61197830A (en) * 1985-02-28 1986-09-02 Sanwa Tekki Corp Hydraulic vibration preventing device
US4744634A (en) * 1986-04-28 1988-05-17 Hughes Aircraft Company Method and apparatus for reducing the effects of vibrational disturbances on the frequency stability of a laser
USRE34215E (en) * 1986-04-28 1993-04-06 Hughes Aircraft Company Method and apparatus for reducing the effects of vibrational disturbances on the frequency stability of a laser
JP2578913Y2 (en) * 1992-09-17 1998-08-20 関西電力株式会社 Reflector support device
US6895030B1 (en) 2000-05-30 2005-05-17 Matsushita Electric Industrial Co., Ltd. Laser oscillating device
US9421641B2 (en) 2011-12-28 2016-08-23 Raytheon Company System and method for providing thermal management of an obscured laser system

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4428743Y1 (en) * 1965-04-12 1969-11-28
US3440563A (en) * 1966-04-19 1969-04-22 Spectra Physics Kinematic mounting structure for laser resonator
DE1614585B2 (en) * 1967-08-19 1971-09-23 OPTICAL TRANSMITTER OR AMPLIFIER
US3641454A (en) * 1970-05-25 1972-02-08 Atomic Energy Commission Electron beam-pumped gas laser system
US3702973A (en) * 1970-09-17 1972-11-14 Avco Corp Laser or ozone generator in which a broad electron beam with a sustainer field produce a large area, uniform discharge

Also Published As

Publication number Publication date
IL43591A0 (en) 1974-06-30
IT997600B (en) 1975-12-30
JPS4984191A (en) 1974-08-13
DE2357927C2 (en) 1984-03-08
FR2207371B1 (en) 1978-10-20
GB1444404A (en) 1976-07-28
CA993698A (en) 1976-07-27
SE395796B (en) 1977-08-22
US3808553A (en) 1974-04-30
JPS5922384B2 (en) 1984-05-26
DE2357927A1 (en) 1974-05-30
FR2207371A1 (en) 1974-06-14
CH580343A5 (en) 1976-09-30

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